{"id":207609,"date":"2025-07-08T09:53:07","date_gmt":"2025-07-08T01:53:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207609\/"},"modified":"2025-07-08T09:53:07","modified_gmt":"2025-07-08T01:53:07","slug":"%e6%8d%95%e8%8e%b7-exec-command-%e7%9a%84%e7%bc%93%e5%86%b2-stdout-%e8%be%93%e5%87%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207609\/","title":{"rendered":"\u6355\u83b7 exec.Command \u7684\u7f13\u51b2 stdout \u8f93\u51fa"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u6355\u83b7 exec.Command \u7684\u7f13\u51b2 stdout \u8f93\u51fa<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-23 22:27:33<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u672c\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u5206\u4eab\u300a\u6355\u83b7 exec.Command \u7684\u7f13\u51b2 stdout \u8f93\u51fa\u300b\uff0c\u8986\u76d6\u4e86Golang\u7684\u5e38\u89c1\u57fa\u7840\u77e5\u8bc6\uff0c\u5176\u5b9e\u4e00\u4e2a\u8bed\u8a00\u7684\u5168\u90e8\u77e5\u8bc6\u70b9\u4e00\u7bc7\u6587\u7ae0\u662f\u4e0d\u53ef\u80fd\u8bf4\u5b8c\u7684\uff0c\u4f46\u5e0c\u671b\u901a\u8fc7\u8fd9\u4e9b\u95ee\u9898\uff0c\u8ba9\u8bfb\u8005\u5bf9\u81ea\u5df1\u7684\u638c\u63e1\u7a0b\u5ea6\u6709\u4e00\u5b9a\u7684\u8ba4\u8bc6(B \u6570)\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u66f4\u597d\u7684\u638c\u63e1\u5b83\u3002<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u6b63\u5728\u5c1d\u8bd5\u6355\u83b7\u5916\u90e8\u7a0b\u5e8f\u7684\u8f93\u51fa\u3002\u793a\u4f8b\uff1a<\/p>\n

#include <stdio.h>\n#include <unistd.h>\n#include <stddef.h>\n\nint main() {\n\n    int i = 0;\n\n    while(i < 10) {\n        printf(\"i = %i\\n\", i++);\n        usleep(2000000);\n    }\n    return 0;\n}<\/pre>\n
\u8fd9\u662f\u6211\u7684 main.go\uff1a<\/p>\n
package main\n\nimport (\n    \"bufio\"\n    \"io\"\n    \"log\"\n    \"os\/exec\"\n)\n\nfunc reecho(closer io.ReadCloser)  {\n    reader := bufio.NewReader(closer)\n\n    for {\n        s, e := reader.ReadString('\\n')\n        if e != nil {\n            log.Println(e)\n            break\n        }\n        log.Println(s)\n    }\n}\n\nfunc main() {\n    cmd := exec.Command(\".\/infcount\")\n    log.Println(\"starting \", cmd)\n    stdout, err := cmd.StdoutPipe()\n    stderr, _ := cmd.StderrPipe()\n\n    if err != nil {\n        log.Fatal(err)\n    }\n    if err := cmd.Start(); err != nil {\n        log.Fatal(err)\n    }\n\n    go reecho(stdout)\n    go reecho(stderr)\n\n    if err := cmd.Wait(); err != nil {\n        log.Fatal(err)\n    }\n}<\/pre>\n
\u95ee\u9898\u662f\u6807\u51c6\u8f93\u51fa\u7684\u7f13\u51b2\u3002 \u201creecho\u201d\u4ec5\u5728\u6807\u51c6\u8f93\u51fa\u7f13\u51b2\u533a\u4e2d\u7684 4096 \u5b57\u8282\u6216\u7a0b\u5e8f\u9000\u51fa\u65f6\u83b7\u53d6\u6570\u636e\uff08\u5bf9\u4e8e\u6211\u7684\u7b80\u77ed\u793a\u4f8b\uff09\u3002\u6709\u6ca1\u6709\u529e\u6cd5\u51cf\u5c11\u7f13\u51b2\u533a\u7684\u5927\u5c0f\u4ee5\u6355\u83b7\u6bcf\u4e00\u884c\u8f93\u51fa\uff1f<\/p>\n
\u66f4\u65b0\uff1a\u4ece shell \u8fd0\u884c\u65f6\uff0c\u76f8\u540c\u7684\u4e8c\u8fdb\u5236\u201cinfcount\u201d\u5de5\u4f5c\u6b63\u5e38\u3002\u5b83\u5c06\u6bcf\u4e2a\u201ci\u201d\u5199\u5165\u5c4f\u5e55\u3002<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u5c06\u5728\u53d1\u751f\u65f6\u8ddf\u8e2a\u8f93\u51fa\u7684 c \u7a0b\u5e8f\u7248\u672c<\/p>\n
#include <stdio.h>\n    #include <unistd.h>\n    #include <stddef.h>\n\n    int main() {\n\n        int i = 0;\n\n        while(i < 10) {\n            printf(\"i = %i\\n\", i++);\n            usleep(2000000);\n            fflush(stdout);\n        }\n        return 0;\n    }<\/pre>\n
\u5982\u679c\u5b83\u662f\u73b0\u6709\u7684\u9884\u7f16\u8bd1\u7a0b\u5e8f\uff0c\u5219 stdbuf<\/code> \u53ef\u80fd\u80fd\u591f\u4fee\u590d\u5b83\uff0c\u8bf7\u53c2\u9605 <\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u6355\u83b7 exec.Command \u7684\u7f13\u51b2 stdout \u8f93\u51fa\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207609","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207609","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207609"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207609\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207609"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207609"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}